Pasteurizing apparatus.



PATENTED NOV. 14, 1905.

F. TYSON. PASTEURIZING APPARATUS.

APPLICATION FILED NOV.25, 1904.

1 g 2 .a i

UNITED STATES PATENT OFFICE.

FRANK TYSON, OF OANN, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, OF ONE-HALF TO H. B. STEWART, OF OA NTON, OHIO.

PASTEURIZING APPARATUS.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Application led November 25,1904. Serial No. 234,309.

[o 117// l/'mnt it may 12o/warn:

Be it known that I, FRANK TYsON, a citizen of the United States, and a resident of Canton, Ohio, have invented certain lmprovements in Pasteurizing Apparatus, of which the following is a specification.

The object of my invention is to provide for the pasteurization of milk or other liquids more expeditiously and e'll'ectively than is possible by the use of the present methods and apparatus with which I am familiar. This object I attain in the manner hereinafter set forth, reference being had to the accompa nying drawings, in which- Figure l is a vertical sectional view of apparatus forming the subject of `my invention and available for use in carrying out my improved process of pasteurization. Fig. 2 is an enlarged diagram showing a plan View of the treating-plate and illustrating one of the features of my invention. Fig. 3 is a .further diagram showing a. sectional view of part of the treating-plate and illustrative of another feature of the invention, and Fig. 4 is a view ilhisiY rating a modification of my invention.

l'lrf: rring, in the first instance, to Fig. l of the drawings, l represents a vessel mounted upon a suitable support and having a central smiling-box for the passage of a vertical shaft 2, whose lower' end is adapted to a bearing in said support, rotative movement being imparted lo said shaft 2 by means of a pair of bevel-gears 3 4, driven from a horizontal shaft 5, wnich is mounted in a bearing on the support for the vessel l and is driven in any suitable manner. The vessel l .has at the top a chambered top or cover comprising a hub (i. a horizontal top plate 7, and a flaring bottom plate 8, these parts inclosing a chamber S). which gradually decreases in depth from the center to the periphery of the cover. The hub (i is secured to the shaft 2 and turns upon a ball-lnaring on the central boss of the vessel l., and in the bottom plate S are Vformed openings l and l1, the openings 10 being adjacent` to the hub 6 and the openings ll being adjacent to the periphery of the cover. The

horizontal top plate 7 of the cover terminates at he periphery in a downwardly-bent flange l2, which contained within an annular trough l, surrounding the vessel l.

Above the ehambered cover of the vessel l is a chambered hood ll, with hollow hub terminating at the top in a funnel 15, and mounted by suitable arms 16 on this chambercd hood is a rail 17, constituting the upper member of a ball-race, whose lower member consists of a similar but oppositely-facing rail 1S, carried by arms l?) on a threaded ring 20, which engages with a similarly-threadcd ring 2l, secured to the vessel. Hence the lower rail 18 is susceptible of vertical adjustment, and the chambered hood ll can be supported at any desired height above the chamber-ed cover of the vessel l and is free to rotate `in any position of such adjustment. Rotation of the hood l-'L in unison with the cover of the vessel l is effected by a transverse bar 22, crossing the hub ol' the said hood and engaging with a vertically-slotted portion of the shaft 2, as shown in Fig. l.

The vessel 1 and its chambered cover are filled with water or other liquid heated to a temperature high enough to effect the desired result, this temperature being maintained practically constant by any suitable system of heating devices-as, for instance, by a steam-coil 30, contained within the vessel 1. Vhen the chambered cover of the vessel is rotated, there will be a constant circulation of the heated water through the same from hub to periphery, owing to the action of centrifugal force, the water entering the chambered cover through the openings and being discharged therefrom through the openings 1l. Hence a uniform degree of heat will be imparted to the horizontal top plate 7 of the cover. 'The milk or other liquid to be pasteurized is admitted through the hollow hub of the hood 14, the chamber within said hood being likewise filled with water heated to the required temperature, which water, if desired, may be caused to circulate through the chamber in any available manner. For instance, the hot water may be fed 'from a pipe 25, through openings 10, formed in the top of the hood le near the hub of the same and may be delivered from the hood through openings 11, formed in the top of the hood nea-r the periphery of tho same into a top chamber 26, from which when the hood is rotated it escapes over the peripheral ICO rim 27 into any suitable receptacle. The milk enters the space between the top plate 7 of the chambered cover and the-bottom plate of the chambered hood and spreads itself in a thin film between these two plates, the flow of the milk from the center to the periphery of the plate 7 being caused by centrifugal force and a constant supply being maintained because of the height of the column of milk in the hollow hub of the hood. A particle of milk coming in contact with the plate 7 at the center of the latter travels in its passage toward the periphery of said plate in a spiral course and with constantly-accelerating speed, the course of the particle being represented diagrammatically in Fig. 3 and an attempt being made to indicate the difference in the speed of travel of the same by the varying distances between the successive dots, whereby the course is represented. Thus the dots are close together at the central portion of the plate, but gradually increase in distance apart as they`approach the periphery. There is at the same time a gradual diminution in the thickness of the iilm of milk on the plate 7, for as the volume of milk supplied thereto at the central portion of the same is limited by the width of the space between said plate and the bottom plate of the hood 14 and as the milk travels with constantly-increasing speed toward the periphery of the plate 7 there must be a diminution in the volume corresponding in a measure to such increased speed of travel, and for this reason a practically uniform heating of the body of milk is effected throughout the entire time of its travel over the plate 7, for when the volume is greatest in bulk it has the slowest movement, and as its rate of movement increases its bulk correspondingly decreases. Hence each square inch of heating-surface presented by the top plate 7 of the chambered cover of the water vessel will in a given period of time have passed over it a substantially equal volume of milk to be heated, and the machine is therefore well calculated for the attainment of the end in view-that is to say, the subjecting of the milk for a given time to a substantially uniform degree of heat which acts equally upon all particles of the volume of milk under treatment. For this reason I am enabled to heat the milk to a temperature more nearly approaching that of the water or other heating agent employed than is possible in other apparatus known to me, and I thereby effect 'a saving, since it is only necessary to heat the water to a temperature a few degrees higher than that desired for the milk, and there is no risk of overheating the latter. Measurably the same result may be obtained without the use of the chambered hood 14, the latter being used simply to provide an additional heating-surface for the film of liquid flowing over the plate 7. The heated liquid escaping from the periphery of the plate 7 is collected in the annular trough 13, from which it may be discharged into any suitable receptacle.

Although I prefer to form the cap or cover for the vessel 1 as a chambered vessel in the manner shown in Fig. 1, such construction is not necessary for the proper carrying out of my invention, since it will be manifest that a plate alone might be used in some cases. For instance, in Fig. 4 I have shown a construction in which the vessel 1 has as a cover a flat plate 7 a and is provided around its top with two annular troughs 13a and 23, one outside of the other, the innermost trough 23 receiving the water overflowing between the wall of the vessel 1 and the plate 7a, which overliow-water is directed downwardly into the trough by means of a rib 24 on the under side of the plate, the pasteurized liquid being discharged from the downturned rim 12 of the plate into the outer trough 13a.

In some cases it is considered necessary in order to complete the pasteurizing operation to cool the liquidl under treatment after gradually heating the same, and it will be evident that the process and apparatus which I have described lends itself as well to such cooling of the liquid as to the heating of the same. Hence the word H treating is used in some of my claims to indicate either heating or cooling or heated or cooled.

Having thus described my invention, I claim and desire to secure by Letters PatentA 1. A pasteurizing apparatus consisting of a rotatable treating-plate whose liquid receiving and carrying surface is transverse to its aXis of rotation, a collecting-receptacle receiving the liquid directly from the edge of said plate, and means for supplying the liq' uid to the central portion of said plate, substantially as specied.

2. A pasteurizing apparatus consisting of a chambered vessel mounted so as to rotate and adapted for the reception of a treating fluid, the surface of said vessel, which receives and carries the liquid to bepasteurized, being in a plane transverse to the axis of rotation of the vessel, a collecting-receptacle receiving the liquid from the edge of said vessel, and means for supplying the liquid to the central portion of said treating-surface, substantially as specified.

3. A pasteurizing apparatus consisting of a water vessel having a rotatable cap or cover, whose top is in a plane transverse to the axis of rotation, and receives and carries the liquid to be pasteurized, a collecting-receptacle receiving the liquid from the edge of said top, and means for supplying the liquid IOO to the central portion of said top, substantially as specified.

i. A pasteurizing apparatus consisting of a water vessel having a chanibered and rotatable cap or cover, whose top is in a plane transverse to the axis of rotation and receives and carries the liquid to be pasteurized, a. collecting-receptacle receiving the liquid froin the edge of said top, and liiieans for supplying the liquid to the central portion of i said top, substantially as specified.

5. A pasteurizing apparatus consisting of a water vessel having a cliarnbered and rotatable cap or cover, whose top is in a plane transverse to the axis of rotation and receives and carries the liquid to be pasteiii'- ized, the bottoni plate of said vessel having openings located at different distances froin the axis of rotation, whereby a flow of the treating fluid through said vessel by centiifugal force is effected, substantially as specified.

(3. A pasteurizing apparatus consisting of a rotatable treating-plate disposed in a plane transverse to its axis of rotation, a second treating-plate parallel with and rotating in the saine direction as the first, iiieans for feeding the liquid to be pasteurized to the space between said plates, and a collectingreceptacle receiving the liquid froni the edge of said plate, substantially as specified.

T. A pasteurizing apparatus consisting of a rotatable treating-plate disposed in a plane transverse to its axis of rotation, a second rotatable treating-plate parallel with the first, iiieans for adjusting one of said plates froni and toward the other, and nieans for feeding the liquid to be pasteurized to the space between the plates, substantially as specified.

S. A pasteurizing apparatus consisting of a rotatable treating-plate presenting a surface transverse to its axis of rotation, a cliainbeied hood rotating in the saine direction as the plate and presenting a surface parallel to that of said treating-plate, iiieans for feeding between said surfaces the liquid to be pas- `teurized, and a collecting-receptacle receiving the liquid froni the edge of said plate, substantially as specified.

9. A pasteurizing apparatus consisting of a rotatable treating-plate having a surface transverse to its axis of rotation, a charnbered hood also free to rotate and presenting a surface parallel to said treating-plate, nieans for varying the distance apart of said surlaces and iiieans for feeding to the space be- ,tween tliein the liquid to be pasteurized, subl stantially as specified.

1f). A pasteurizing apparatus consisting of a water vessel having a rotatable cover whose surface is in a plane transverse to the axis of rotation, a parallel and correspondingly rotatable treating-plate, cooperating l theiewitli, ineans for feeding the liquid to be pasteurized to the space between said plate and cover, and a eollecting-receptaclereceiving the liquid froin the edge of said plate, substantially as specified.

11. A pasteurizing apparatus consisting of a water vessel having a rotatable cover whose surface is in a plane transverse to the axis of rotation, a parallel and correspond- I inglyrotatable treating -plate coperating therewith, iiieans for varying the distance between the plate and cover, and iiieans for feeding to the space between theni the liquid to be pasteurized, substantially as specified.

12. A pasteurizing apparatus consisting of a water vessel having a rotatable cover containing a water-chamber and presenting a surface transverse to the axis of rotation, a parallel and correspondiiigly-rotatable treating-plate cooperating therewith, and iiieans for feeding the liquid to be pasteurized to the space between said plate and cover, substantially as specified.

13. A pasteurizing apparatus consisting of a water vessel having a rotatable cover containing a water-chamber and presenting a surface transverse to the axis of rotation, a parallel and correspondingly-rotatable treating-plate, cot'iperating therewith, iiieans for varying the width of the space between the plate and cover and iiieans for feeding to said space the liquid to be pasteurized, substaiitially as specified.

14. A pasteurizing apparatus consisting of a water vessel having a rotatable cover presenting a surface transverse to the axis of iotation, a chainbered and rotatable hood, presenting a surface parallel with that of the cover, and iiieans for 'feeding the liquid to be pasteurized to the space between said siii'- faces, substantially as specified.

15. A pasteurizing apparatus consisting of a water vessel having a rotatable cover presenting a surface transverse to the axis of rotation, a chanibered and rotatable hood presenting a surface parallel with that of the cover, iiieans for varying the width of the space between said cover and hood, and iiieans for feeding to said space the liquid to be pasteurized, substantially as specified.

16. A pasteurizing apparatus consisting of a water vessel having a rotatable cover containing a water-chamber and presenting a surface transverse to the axis of rotation, a chainbcred and `rotatable hood presenting a surface parallel with that of the cover, and means for feeding to the space between said surfaces the liquid tobe pasteurized,siibstantially as specified.

17. A pasteurizing apparatus consisting of i a water vessel having a rotatable cover coni taining a water-chamber and presenting a IOO surface transverse to the aXis of rotation7 a In testimony whereof I have signed my chambered and rotatable hood presenting a name to this specification in the presence of surface parallel with that of the cover, means two subscribing witnesses.

Jfor varying the width of the space between FRANK TYSN. 5 said hood and cover, and means for feeding Vitnesses:

to said space the liquid to be pastenrized7 CHRISTINE RACKLE,

substantially as speciiied. WM. SIMPSON. 

